Improvement in machines for cutting veneers



` UNITED STATES PATENT OFFICE..

HARRISON PARKER AND CHARLES W. HAWKES, OF BOSTON, MASS.

IMPROVEMENT IN MACHINES FOR CUTTING VENEERS.

Specification forming part of Letters Patent No. 39,352, dated July 28,1863.

To all whom it may concern:

Be it known that we, HARRISON PARKER and CHARLES W. HAwKEs, both ofBoston, in the county of Suffolk and Commonwealth of Massachusetts, haveinvented a new and useful Improvement on a Machine for Cutting Veneers;and we do hereby declare that the following; is a full, clear, and exactdescription of the construction and operation of the same, referencebeing had to the accompanying drawings, making a part of thisspecication, and to the letters of reference marked thereon, in which-Figure l is an end elevation. Fig. 2 is a back-side elevation, with aportion of the frame and bed cut away to show the method of operatingthe knife. Fig. 3 is a plan. Fig. 4 is a side, and Fig. 5 is an endview, of the sliding rocker-lever which operates the knife. Fig. 6 is anend view of the head-block, with one of the end pieces left oft',showing the manner in which the knife and slide is attached thereto; andFig. 7 represents another method of forming the slide. l

The blue diagonal lines represent sections, and similar letters ofreference indicate corresponding parts in the several figures.

The nature of our invention consists in giving a longitudinal slidingmotion to the knife while performing the cut, thus producing a draw cut,which greatlyfacilitates the cutting of veneers.

The frame is composed of two side pieces, A A, and three girts, B B B,secured together in the usual manner with bolts. There is a verticalguide, C, formed on each of the side pieces, A A, projecting inwardly,and a vertical bed-plate, D, is fitted to slide freely up and downthereon. A horizontal cross-beam, E, is secured to the upper edge of thebedplate D, each end of which extends out by the frame with wrist-pinsformed thereon,to which connecting-rods are to be attached to givemotion to the bed-plate. A portion of the lower part of the frame A Aprojects out in front a distance sufficient to form a seat, F F, in ahorizontal plane, for the head-block G to rest and slide upon. Thehead-block G extends across from one side of the frame to the other, andhas a bearing at each end on the seat F F, to which it is tted to slidetoward and from the bed-plate D. This head-block is fed by means of afeed-screw, H, at-each end outside of the frame, each screw having abevelgear, l, xed thereon, and corresponding gears J meshing therein,fixed on a crossshait, K, by which means the feed-screws H H are gearedtogether for the purpose of giv-- ing a uniform feed to both ends of theheadblock. The block L, to be cut into veneers, is secured to the frontside of the bed-plate D. There is a way, a, formed on the back side ofthe head-block G, toward the bed-plate D, eX- tending horizontallynearly the whole length of the head-block. This way a may be madeV-shaped, as represented in Fig. 6, or it may be made square, asrepresented in Fig. 7, or in any other shape required. A'knife-slide, b,extending nearly the whole length of the headblock G, is tted to slide ashort distance horizontally back and forth on the way a. The knife c isfirmly secured to the upper edge of the knife-sli de b, as representedin Figs. 2and 6.

At one end of the machine, outside of the frame, there is a horizontalrocker-shaft, d, fitted to turn in a box, e, secured to the rear part ofthe frame, and on one side of this shaftl there is a xed spline, f,extending from the front end back about half its length. A slidingrocker-lever, g, is fitted to this rocker-shaft cl, with a groove, z',to receive the spline f, and is so tted that it will slidelongitudinally on the' shaft and also turn with it. This slidingrocker-lever g has a long hub fitted to turn in a box, h, secured to theend of the head-block G, by which it is held in its required position.This sliding rocker-lever g is also connected by links r r to theknife-slide b. On the rear end of the horizontal shaft d there is afixed lever, j, extending through a narrow opening in the-sideof theframe A, and to the end of this lever j, inside of the frame, aconnecting- `link, 7c, is attached and extending upward. 1t

is also attached to a corresponding lever, Z, fixed to a shorthorizontal shaft, m, hung to or extending through the upper girt, B. Onthe other end of the shaft m, near the back side of the bed-plate D,there is a long lever, n, fixed thereto with a fork or slot, s, cutthrough the outer end, in which a stud or pin, o, set in the back sideof the bed plate, is made to play.

Operation: This machine is operated by mea-ns of conn ecting-rodsattached to the crossbeam E and to cranks below, which give anlip-and-down motion to the bedplate D, and, as the pin ois fixed in thebed-plate and Works in the slot s, a vibratory motion is communicated tothe long lever n, and also to the lever l, and by means of theconnecting-link 7c the same vibratory motion is communicated tothe leverj, thus giving a rocking mot-ion to the horizontal rocker shaft d, and avibratory or rocking motion to the sliding rocker-lever g, and, as thissliding rocker-levervisl connected bythe links r r to the knifeslide b,a reciproeating motion is communicated to the slide and knife c,attached thereto. By this arrangement the knife is made to slide length-Wise during the Whole time the out is being performed, thereby producinga draw cut,

HARRISON PARKER. GRAS. W. HAWKES.

Vitnesses:

B. F. W. FoLsoM, GEORGE W. SNOW.

